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<div>:: <span class="kw">deftheorem </span>   defines <a href="surreal0.html#R5" title="SURREAL0:pred.5">&lt;=</a> <a onclick="hs(this)" href="javascript:()">SURREAL0:def 17 : <br/></a><span> for <font color="Olive" title="b1">x</font>, <font color="Olive" title="b2">y</font> being   <a href="surreal0.html#NM1" title="SURREAL0:NM.1">Surreal</a> holds <br/> ( <font color="Olive" title="b1">x</font> <a href="surreal0.html#R5" title="SURREAL0:pred.5">&lt;=</a> <font color="Olive" title="b2">y</font> iff  ex <font color="Olive" title="b3">A</font> being   <a href="ordinal1.html#NM3" title="ORDINAL1:NM.3">Ordinal</a> st <font color="Olive" title="b1">x</font> <a href="surreal0.html#R1" title="SURREAL0:pred.1">&lt;=</a>  <a href="surreal0.html#K9" title="SURREAL0:func.9">No_Ord</a> <font color="Olive" title="b3">A</font>,<font color="Olive" title="b2">y</font> );<br/></span></div>
